In the first sign that the Fukushima nuclear disaster may be changing life around it, scientists say they've found mutant butterflies.
Some of the butterflies had abnormalities in their legs, antennae, and abdomens, and dents in their eyes, according to the study published in Scientific Reports, an online journal from the team behind Nature. Researchers also found that some affected butterflies had broken or wrinkled wings, changes in wing size, color pattern changes, and spots disappearing or increasing on the butterflies.
The study began two months after an earthquake and tsunami devastated swaths of northeastern Japan in March 2011, triggering a nuclear disaster. The Fukushima Daiichi plant spewed radiation and displaced tens of thousands of residents from the surrounding area in the worst nuclear accident since the 1986 Chernobyl disaster in Ukraine.
In May 2011, researchers collected more than 100 pale grass blue butterflies in and around the Fukushima prefecture and found that 12% of them had abnormalities or mutations. When those butterflies mated, the rate of mutations in the offspring rose to 18%, according to the study, which added that some died before reaching adulthood. When the offspring mated with healthy butterflies that weren't affected by the nuclear crisis, the abnormality rate rose to 34%, indicating that the mutations were being passed on through genes to offspring at high rates even when one of the parent butterflies was healthy.
The scientists wanted to find out how things stood after a longer amount of time and again collected more than 200 butterflies last September. Twenty-eight percent of the butterflies showed abnormalities, but the rate of mutated offspring jumped to 52%, according to researchers. The study indicated that second-generation butterflies, the ones collected in September, likely saw higher numbers of mutations because they were exposed to the radiation either as larvae or earlier than adult butterflies first collected.
To make sure that the nuclear disaster was in fact the cause of the mutations, researchers collected butterflies that had not been affected by radiation and gave them low-dose exposures of radiation and found similar results.
"We conclude that artificial radionuclides from the Fukushima Nuclear Power Plant caused physiological and genetic damage to this species," the study said.
The results of the study bring up concerns about the larger impact of the Fukushima disaster and the impact it will have on the ecosystem in Japan and nearby areas, as well as what we can learn for future nuclear disasters.
"Our results are consistent with the previous field studies that showed that butterfly populations are highly sensitive to artificial radionuclide contamination in Chernobyl and Fukushima," the study said. "Together, the present study indicates that the pale grass blue butterfly is probably one of the best indicator species for radionuclide contamination in Japan."
One of the researchers, Joji Otaki, an associate professor at the University of the Ryukyus in Okinawa, told reporters that while butterflies may be the best indicator, the study should also lead to more research on what else may be affected by the radiation.
"Sensitivity (to irradiation) varies between species, so research should be conducted on other animals," Otaki told the Japan Times.
Otaki said while there is still plenty of research to be done on radiation, there shouldn't be large-scale concern about this kind of mutation in humans.
"Humans are totally different from butterflies and they should be far more resistant" to radiation, he told the newspaper.
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Gallery: Then and now
This is old news. The butterflies are now fighting crime in the Tokyo metropolitan area.
So the land of Godzilla has mutating life forms. Cool.
Exactly my first thought!!
We can only hope and pray that these butterflies use their powers for the betterment of mankind.
I would be interested in a follow-up article on the effects of radiation in this region and the local corals. This region is so rich in very delicate sea life because of the black current, I wonder if they lost anything? Any real experts out there? I am afraid to ask questions in these blogs because I am looking for folks with true expertise not the wingnuts that typically respond!
True: I too would be interested.
What was the amount of wast that was lost and to what level of strength was it . Also what was the time period that it was release, min.s, hours,days, weeks, ? . They do not tell too much.
And what will be the effects be on the ocean life from there to Alaska and Cal. ?
Don't you hear those little twins singing......
oh boy, does this mean they should be looking for Godzilla?...I'm not making a joke, I'm serious.
Ah earthlings. Absolutely hell-bent on making their planet a nuclear wasteland all in the name of "progress". Fools.
Mothra has returned!! Where is Godzilla?!
I cannot believe I haven't seen......................ITS MOTHARA!!! in butterfly form....where is Godzilla??
It looks like Mothra will soon be a reality....
Godzirra coming foh you!
I've been trying to tell people for years that TOHO wasn't just making all those Godzilla movies for entertainment. They were warnings. Now look... This is how Mothra is created. Soon We'll have Rodan, Godzilla, The Giant Lobster, and the whole gang to deal with...
Just let me know when "Mothra" shows up...
Only thing we're missing is Godzilla to start fighting it.
Beat me to it ... LOL!
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